Overhead door lock



Jul 21, 1936.

D. M. ROBINSON OVERHEAD DOOR LOCK Filed Feb. 1, 1934 2 Sheets-Sheet l w w w y 1, 1936. D. M. ROBINSON OVERHEAD DOOR LOCK 2 Sheets- Sheet 2 Fild Feb. 1, 1934 3mm flavidMHobinson Patented July 21, 1936 UNITED STATES PATENT OFFICE OVERHEAD DOOR LOCK David M. Robinson, New Britain, Conn., assignor to The Stanley Works, New Britain,

Conn., a

corporation of Connecticut Application February 1, 1934, Serial No. 709,247

2 Claims. (CI. -29) which will not readily get out of order in use.

A further object lies in the provision of a device of the character described which is easy to operate and is quick and positive in operation.

Other objectsand advantages will appear as the description proceeds.

In the accompanying drawings, I have shown a preferred form of the device of the invention and a somewhat modified form thereof. The drawings, however, are for the purpose of illustration only and are not to be taken as limiting the invention the scope of which is to be measured entirely bythe scope of the appended claims.

In the drawings:

Fig.1 is an elevational view of a fragmentary portion of the inner surface of a door such as a garage door showing a locking mechanism constructed according to the idea of this invention a plied thereto;

Fig. 2 is an elevational view of an enlarged scale similar to Fig. 1 showing the control portion of my improved locking mechanism; I

Fig. 3 is a sectional view on the line 3-4 of Fig. 2;

Fig. 4 is a sectional view on the line 4-4 of Fig. 2 looking in the direction of the. arrows;-

Fig. 5 is an elevational view of a fragmentary portion of a garage door similar to Fig. 1 showing a somewhat modified form of the device of the invention; and

Fig. 6 is a view similar to Fig. 2 showing the modified form of the invention.

7 Referring to the drawings in detail, the numeral Ill generally indicates a door, such as an overhead garage door, and the numeral ll indicates one of the door jambs, it being understood that a suitable iamb is provided at each side of the door. The door is adapted to be locked in closed position by means of latch mechanisms generally indicated at If and cooperating latch keepers as indicated at IS. The latch mechanism If is secured to the door adjacent to one edge thereof and comprises acasing l5 provided with a central cylindrical portion it upon each side of which there is a flange portion H. The flange portions are provided with suitable apertures through which screws l8 extend to secure the easing IE to the inner surface of the door [0. Within the cylindrical portion 16, there is a latch bolt 5 20 having an extension 22 which extends through the cylindrical portion l6 and is connected at the end opposite the latch bolt 20 to a link 24. The rearend of the cylindrical member is is provided with an abutment 25, and between this 6 abutment and the latch bolt 20 there is a coiled compression spring 21 adapted to urge the latch bolt outwardly of the casing l2 to engage the latch keeper l3 which comprises a plate provided with suitable apertures through which screws 28 5 extend to secure the plate to the inner surface of the door jamb II.' The link 24 is pivotally connected to the extension 22 by means of co0perating apertured lugs through which extends a transverse pin 30.

In the form of the invention illustrated in 20 Figs. 1 anti 2, there is preferably a latch mecha-v nism at each side of the door. However, as these latch mechanisms are similar in construction, it

is believed that an illustration and description 25 of one of them is sufficient for the purpose of. this disclosure. The link 24 is connected at the end opposite the latch mechanism I2 to an arm 32 by suitable means such as a clamp plate 34 through the arm and the clamp plate to frictionally engage the end of the link 24 betweenthe arm 32 and the clamp plate 34. The end of t e arm 32 opposite the link 24 is formed with a loop 31 within which there is an aperture 38 for a purpose to be presently described. A face plate 40 is secured upon the inner surface of the door by suitable means such as the screws 4| extending through apertures in the face plate into the door, preferably along the vertical center of the door and at a height above the bottom of the door convenient to manual operation of the illustrated in Fig. 2 and a screw 35 extending 3o lock. 42 indicates an abutment .formed by turnlower aperture 43, there is mounted for rotation relative to the plate 40 a. latch operator 45 which comprises a flat plate having a centrally located cylindrical offset portion 41 which fits into the aperture 43 and provides a bearing for the rotatjon of the operator 45 relative to the plate 48. The plate 48 is provided with an annular flange or shoulder 48 surrounding the aperture 43, and an abutment member 58 in the form of a circular disc is secured to the oifset cylindrical portion 41 by suitable means, such as the rivets 5i, in such a manner that its circumferential portion bears upon the surface of the flange 48 on the side of the plate 48 opposite the operator 45 to restrain the operating member 45 against removal from the plate 48. The abutment 58 and offset cylindrical portion 41 are each provided coaxially thereof with a square aperture indicated at 53 in Fig. 6 for the reception therein of one end of a square stem 55 which extends through the door and carries upon its end outside of the door an exterior lock handle 51.

Referring now to Figs. 2 and 6, it will be ob-- served that the latch operator 45 is provided with a straight edge 58 and straight edges 88 and 8| at 'each end of the edge 58 and with an edge 83 in the form of an arc of a circle having its center at the axis of the aperture 53 connecting the edges 88 and Bi opposite the edge 58. This edge 83 is provided with a pair of radial notches 85- and 88 for a purpose to be presently described. Along the edges 88 and iii, the latch operator 45 is provided with upstanding ears or lugs 88 and 88 respectively extending in a direction opposite to the cylindrical depression 41. At their extremities, the cars 88 and 68 are bent outwardly to lie in the plane parallel to that. of the plate 45, and a side handle 18 is suitably secured to these extremities by suitable means, such as riveting or spot welding.

Referring particularly to Fig. 3, it will be observed that the handle 18 is in the form of a U-shaped member having one leg ll secured to the ears 88 and 88 and the other leg 12 overlying the leg II and spaced therefrom a sumcient distance to provide a convenient handle for manually rotating the plate 45. The ears 88 and 88 have reduced portions 14 and I5 respectively in the upstanding portions thereof adjacent to the bent over extremities, and these reduced portions are adapted to be received in the apertures 38 in the ends of the arms 32-, as particularly illustrated in Fig. 2, the loops 31 being provided with slots 11 through which the reduced portion of the respective car may be passed into the aperture. It will now be observed that as the ears 88 and 88 are positionedon diametrically opposite sides of the cylindrical or bearing portion 41 of the plate 48, a rotation of the plate 45 will move the arms 32 and links 24 in opposite-directions, rotation of the handle 18 in one direction, withdrawing the latch bolts 28 from the-keepers 13,- and rotation thereof in the oppositedirection, permitting the springs 21f to force the latch bolts out into engagement with I the abutment plate l3. As theoutside handle '51 is also connected to-the plate 45, it will, be. observed that I have provided means by which the door may be-manually latched and 'unlatched fromjeither side of the door by manualrotation oi the handle 51 orhandle 18.

In the form of the invention illustrated in Fig. 5, the operation is exactly the same as that described above except that in this modified form I' have provided only one latch mechanism l2 located at the bottom of the'fdoor immediately below the lock mechanism and, therefore, this rmodified .form of..the invention; utilizes only one link 24 and arm 32, the construction and operation being in all other respectsfithe sameexce'pt that the handle I8 and the plate 45 are positioned at right angles to the position utilized for the preferred form of the invention, as illustrated in Fig. 1.

In order to releasably lock the latch mechanisms in position to hold the door closed, I have provided a locking dog generally indicated at 88 comprising a plate having a circular portion 8|, a tapered portion 82, and a handle portion 83. The plate- 88 is rotatably mounted in the upper aperture 44 of the face plate 48 by means of a hollow rivet 84, and is proportioned so that the extremity of the tapered portion 82 thereof is adapted to engage with one of the radial notches 85 or 88 or to be released therefrom upon a slight angular rotation of the dog, as particularly illustrated in Fig. 1. The rotational movement of this locking dog 88 is limited by means of a rivet 85 which extends through a radial slot 88 in the dog and is secured in the face plate 48. The inner end of the hollow rivet 84 is provided with a circumferential slot 81, and the locking dog 88 is provided with a tongue 88 having a width less than the length of the slot to provide an operative lost motion connection between the hollow rivet and the locking dog. The handle portion 83 is ofiset from the remainder of the plate to provide a convenient means for manually moving the dog from the inside of the door. A lock mechanism, generally indicated at 88, is mounted in the door opposite the aperture 44, and has an operating member 82 extending into an X-shaped aperture 83 provided in the head of the hollow rivet 84 concentric with the circular portion 8i thereof. A key 85 may be fed into the lock mech- 3 anlsm 88 from the outside of the door to operate the lock mechanism and operating member 82 to lost motion connection between the locking dog and the hollow rivet 84, if the operator happens to be within the enclosure or by means of the key 85 if the operator happens to be outside of the enclosure. The latch mechanisms l2 may then be released by manually rotating the inside han-.

dle 18 of the outside handle 51, and the door may then be opened. The door is provided withtwo apertures 88 and 81 therethrough corresponding with the apertures 43 and 44 in the face plate 48 and the other ends of these apertures 88 and 81 are covered by escutcheon plates I88 andv l8l, the

escutcheon plate l8l having an aperture therein for the accommodation of the interior handle 5'! and the escutcheon plate i8i having an aperture for the accommodationof the lock mechanism 88.

'These escutcheon plates may be secured to the doorby suitable means, such as screws I83, ex-

tending through suitable apertures through the escutcheon plates and into the door.

From an inspectionof Fig. 3, it will be observed that the reduced portions 14 and I5 of the ears 88 and 88 are positioned. at opposite ends of'the upstanding portions of these cars so that when two arms 32 and 32a areutilized, as in the preferred form of the invention illustrated in Figs. 1, 2, and 3, these arms may overlap each 'other' in different vertical planes. It will also be observed that the arms 32 and 32a are bent, as indicated at I85, so that the apertures 38 and 38a may lie in the same ama w I line, and the arms will at the same time accom- Having now described my invention so that others skilled in the art may clearly understand the same, what I desire to secure by Letters Patent is as follows:

i. A latch operating mechanism comprising, a

face plate, a control plate rotatably mounted on said face plate, an abutment on said face plate for limiting the rotation of said control plate from one to the other of two operative positions, a radial notch in one edge ofsaid control plate. and a locking dog pivoted on said face plate having two operative positions in one which it engages said notch t o restrain said control plate against movement from one of its operative positions 'and in the other of which it clears said notch to release said control plate for rotation; a pin and slot for limiting the movement of said locking dog from one to the other of its two operative positionaand means for operatively connecting said control plate with a latch bolt where- 5 by. rotation of said control plate will retract or project the latch bolt. 2. A latch operating-mechanism comprising a i ageMplate-haviif a flanged aperture therein, a control plate having a circular indentation rotatably received in said aperture and a pair of upstanding diametrically opposed ears, an abutment member secured to said indentedportion of said control plate andbearing against the flange on said face plate to maintain said control plate and said face plate in associated relation, an outside handle having an operative connection with said abutment member, an inside handle permanently secured to said ears, means associated with said ears to operate a latch bolt upon rota- 7 tion of said control plate, and means for'lockin said control plate against rotation. I

DAVID M. ROBINSON. 

